Portable milling tool

Abstract

A unit for milling rectangular work members, where a machined fit is required, such as the door facings of a filter unit having a series of doors into an exchange unit, or equipment bases where a pump or turbine is being installed which requires a machined surface and it is necessary to accomplish the cut in place.

What I claim is: 
     
       1. In a portable milling tool, a rectangular framework, tracks formed in the longitudinal member of the framework and carriages mounted to move longitudinally in said tracks, transverse tracks mounted on said carriages and a cutter carriage mounted on said transverse tracks, a cutter adjustably mounted on said cutter carriage and means for moving said cutter carriage transversely or longitudinally as said cutter is actuated, said cutter comprising a motor having a drive shaft extending from one end and a cutter head mounted on said drive shaft, a tubular housing receiving said motor having a bearing chamber and a bearing supporting said drive shaft, and said housing being externally threaded to receive an adjusting nut, and an internally threaded collar mounted on said housing and movable by said nut, said housing having a keyway formed longitudinally therein and a key anchored to said collar and mounted in said keyway maintaining said housing against rotation as the nut is rotated. 
     
     
       2. The device defined in claim 1 wherein independent motors are provided for independent operation of said carriages and said cutter.